Amplifier



FIG. 1 is a front, top, right perspective view of an amplifier showing my new design;

FIG. 2 is a front, bottom, right perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines shown are included for the purpose of illustrating portions of the amplifier that form no part of the claim. 

CLAIM The ornamental design for an amplifier, as shown and described. 